@Fez
BIOS update is a good suggestion. That said, I wonder if there may be something with windows thinking it has multiple OSs installed.
If you type msconfig on the Windows search, hit enter, and then go to boot, what does it look like? Is there just a single entry for Windows 10, with it being the current and default OS?

Yep. Maybe the very specific way the Wyls dealt with Orys would not have worked, but they could certainly have made the place impassable and a deathtrap, and the Wyls have their tunnels to hide away in.

You're right. But Ned didn't say he saw Robert then -- in fact, he said the last time he saw Robert was Greyjoy's Rebellion.
Notably, roughly around the date that Ned thinks he saw Tommen is also roughly about the date of the birth of Robert Arryn... and Catelyn indicates she saw him as an infant.
Put these together, and it seems Cat and Ned went south to see Lysa after the birth of Robert, and that Cersei happened to be around the area -- perhaps travelling with young Tommen to/from Casterly Rock -- and they ended up encountering her. That fits all the pieces together.

That statement from GRRM is written after AGoT. He knows very well how he described Tywin's forces when he wrote it. Every host is going to have less well-equipped or trained men, and in Tywin's case he used this to provide a deliberate division of "cannon fodder" to winnow them out (and try and lure the northmen into a trap) rather than having these men interspersed with more experienced men who would help shape them up.

From the SSM:
To my mind, I think much of the infantry we see are not professional men-at-arms, but rather smallfolk who have variable degrees of drilling. The wealthier and more conscientious a lord, the likelier they are to spend time and effort (and forego a little income) by having their smallfolk training with some regularity, with people overseeing it, and stocks of arms at hand, while others (like Eustace Osgrey) have very little wherewithal. Similarly, the longbowmen of any real quality likely train regularly, as part of their service to the lord they're sworn to.

She is not a "plot line". She's a historical figure, and GRRM didn't forget her, mentioning her half a dozen times or more, including details such as how she traveled with Jaehaerys on Vermithor, and her being appointed the gaoler in charge of Princess Saera.

My guess is that most smallfolk who have land do so as tenants of a lord, and this would mean they have some obligations, obligations that can't be met if they leave that land. But presumably they can discharge those obligations, as Varys suggests -- pay their expected rent, maybe a small tax on top of that, and go where they please. And even smallfolk who outright own their own land (and we know they exist) likely swear some service to the local lord for their protection, obligations that they'd have to transfer to someone else if they decided to sell their land and go elsewhere.

Bloodraven can also command some lordling to go back to his lands. As Ser Rodrik orders the Wild Rabbits to quit their antics and go back to Torrhen's Square. Or as Jaime commands Ryman Frey to decamp from Riverrun.
Bloodraven's order is to try and preserve the peace and stability, because these starving people are only going to cause more problems by mobilizing than they'd solve. It doesn't implicate them as being serfs who are bound to the land.
Sure. Which is why lords need to be careful with how they treat their smallfolk, broadly speaking.
Many don't because many of them are happy enough with what they have versus the chance that they won't . Better to toil with land that's sure under your feet than to set out hoping you'll manage to acquire a plot of land elsewhere. So, yeah, you don't need serfdom to explain why peasants tend to put up with even fairly unpleasant lords -- the alternatives are often worse.
The only "chain" is the land. There are no lords that we know of who are actively offering to hand out farms to people who move to them. So if you are a farmer working a lord's land, paying rent for it, and you get upset -- what do you do? You leave behind your home, you leave behind your land and your crop, you leave behind the legacy of your heirs, and you go somewhere else to do ... what? Become a hired hand for some other farmer, and hope to have a little room in a cottage for you and your family? Or do you just keep your head down and keep working the land you've got and just hope things will get better?
You do not need serfdom to have peasants or feudalism, and for that matter the way George has written about the thralldom in the Iron Islands makes it clear that it's a custom that is frowned upon in Westeros, even though it's essentially a type of serfdom. Smallfolk are free in the Seven Kingdoms, free to strike out and try to make a different life for themselves, with the only sticking point is that making a life for yourself is hard when you can't take your land with you and you may have no good prospects for acquiring new land.

Serfdom doesn't exist in Westeros, outside the thralldom of the Iron Islands. It's a word George has never used in discussing smallfolk, we meet many smallfolk who have travelled and settled in new places, and so on.